A brown pelican preening, reaching with its beak to the uropygial gland (preen gland) near the base of its tail. Preen oil from the uropygial gland is spread by the pelican's beak and back of its head to all other feathers on the pelican, helping to keep them water resistant and dry. Note adult winter breeding plumage in display, with brown neck, red gular throat pouch and yellow and white head.
Image ID: 20295
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California, USA

Adult male humpback whale singing, suspended motionless underwater. Only male humpbacks have been observed singing. All humpbacks in the North Pacific sing the same whale song each year, and the song changes slightly from one year to the next.
Image ID: 02813
Species: Humpback whale, Megaptera novaeangliae
Location: Maui, Hawaii, USA

Adult male humpback whale bubble streaming underwater. The male escort humpback whale seen here is emitting a curtain of bubbles as it swims behind a female during competitive group activities. The bubble curtain may be meant as warning or visual obstruction to other nearby male whales interested in the female.
Image ID: 04444
Species: Humpback whale, Megaptera novaeangliae
Location: Maui, Hawaii, USA

Adult male north Pacific humpback whale bubble streaming underwater in the midst of a competitive group. The male escort humpback whale seen here is emitting a curtain of bubbles as it swims closely behind a female, . The bubble curtain may be meant as warning or visual obstruction to other nearby males interested in the female.
Image ID: 05999
Species: Humpback whale, Megaptera novaeangliae
Location: Maui, Hawaii, USA

Adult male north Pacific humpback whale bubble streaming underwater in the midst of a competitive group. The male escort humpback whale seen here is emitting a curtain of bubbles as it swims closely behind a female, . The bubble curtain may be meant as warning or visual obstruction to other nearby males interested in the female.
Image ID: 06037
Species: Humpback whale, Megaptera novaeangliae
Location: Maui, Hawaii, USA